package njupt.Servlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import factory.DAOFactory;

/**
 * @author leon(liangzou0318@gmail.com)
 * @date 2012-4-28
 * @filaname checkServlet.java
 */
public class checkServlet extends HttpServlet {

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		PrintWriter out=resp.getWriter();
		  System.out.println("checkexist");
		  int userid=Integer.parseInt(req.getParameter("userid"));
		  try {
			if(DAOFactory.getUserDAOinstance().checkuserexit(userid)!=0){
				System.out.println("end");
				out.print("true");
				
			}
			else {out.print("false");}
		} catch (Exception e) {
			
			e.printStackTrace();
		}
		  
	  }
	

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
             this.doGet(req, resp);
	}

}
